Injection methods

gistfile1.rb

def factorial(number)
  product = 1
  if number != 0
    (1..number).each do |operand|
      product *= operand
    end
  end
  product
end















def factorial(number)
  product = 1
  if number != 0
    (1..number).each { |n| product *= n } 
  end
  product
end















def factorial(number)
  (1..number).inject(1) { |product, n| product * n}
end














def factorial(number)
  (1..number).inject(1) do |product, n | 
    puts "----- Iteration #: #{n} ---------"
    puts "product = #{product}"
    puts "factor = #{n}"
    puts "New Product =  #{product*n}"
    puts
    product * n
  end
end


def factorial(number)
  (1..number).inject(1, :*)
end